Research Status and Trend of Natural Gas Hydrate in China

2014 ◽  
Vol 978 ◽  
pp. 165-168 ◽  
Author(s):  
Rong Huo ◽  
Kai Bo Duan
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Alternative Energy ◽  
Energy Resource ◽  
Clean Energy ◽  
Development Trend ◽  
Research Progress ◽  
Natural Gas Hydrate ◽  
Environment Quality ◽  
Further Development

With the further development of national economy, people have become more concerned about the environment quality. Especially in recent years, due to the frequent occurrence of hazy weather, there has been a growing demand for clean energy [Fig. 1]. As one kind of non-conventional energy, natural gas hydrate, featured by large reserves and relatively clean products of combustion, is considered by the scientific community to be an alternative energy resource in replacement of coal and petroleum. This paper gives a brief introduction of the research progress of natural gas hydrate both at home and abroad, presents the research results and the obstacles in the next step to be taken for China, and then looks into the future development trend.

scholarly journals Focus on the development of natural gas hydrate in China

2016 ◽  
Author(s):  
Zhongfu Tan ◽  
Ge Pan ◽  
Pingkuo Liu
Keyword(s):  
Natural Gas ◽  
Future Development ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Clean Energy ◽  
Development Trend ◽  
Natural Gas Hydrate ◽  
The World ◽  
The Future ◽  
Resource Shortage

Natural gas hydrate, also known as combustible ice and mainly composed of methane, it is identified as the potential clean energy in the 21th century. Due to its large reserves, gas hydrate can ease problems caused by energy resource shortage and has gained attention around the world. In this paper, we focus on the exploration and development of gas hydrate as well as discussing its status and future development trend in China and abroad, then we analyze its opportunities and challenges in China from four aspects: resource, technology, economy and police with five forces model and PEST method. The results show, China has abundance gas hydrate resource; however the backward technologies and inadequate investment has seriously hindered the future development of gas hydrate, so China should establish relevant cooperation framework and intuitional arrangement to attract more investment as well as breaking through technical difficulties to make gas hydrate commercialization as soon as possible.

scholarly journals Evaluation and re-understanding of the global natural gas hydrate resources

2021 ◽  
Vol 18 (2) ◽  
pp. 323-338
Author(s):  
Xiong-Qi Pang ◽  
Zhuo-Heng Chen ◽  
Cheng-Zao Jia ◽  
En-Ze Wang ◽  
He-Sheng Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Material Balance ◽  
Energy Resource ◽  
Resource Assessment ◽  
Future Trend ◽  
Natural Gas Hydrate ◽  
The Future ◽  
Recoverable Resources

AbstractNatural gas hydrate (NGH) has been widely considered as an alternative to conventional oil and gas resources in the future energy resource supply since Trofimuk’s first resource assessment in 1973. At least 29 global estimates have been published from various studies so far, among which 24 estimates are greater than the total conventional gas resources. If drawn in chronological order, the 29 historical resource estimates show a clear downward trend, reflecting the changes in our perception with respect to its resource potential with increasing our knowledge on the NGH with time. A time series of the 29 estimates was used to establish a statistical model for predict the future trend. The model produces an expected resource value of 41.46 × 1012 m3 at the year of 2050. The statistical trend projected future gas hydrate resource is only about 10% of total natural gas resource in conventional reservoir, consistent with estimates of global technically recoverable resources (TRR) in gas hydrate from Monte Carlo technique based on volumetric and material balance approaches. Considering the technical challenges and high cost in commercial production and the lack of competitive advantages compared with rapid growing unconventional and renewable resources, only those on the very top of the gas hydrate resource pyramid will be added to future energy supply. It is unlikely that the NGH will be the major energy source in the future.

Nuclear Magnetic Resonance Logging Evaluation of Natural Gas Hydrate Reservoir

2012 ◽  
Vol 482-484 ◽  
pp. 1017-1020
Author(s):  
Xin Li ◽  
Li Zhi Xiao ◽  
Tian Lin An
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Natural Gas Hydrate ◽  
Reservoir Evaluation ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir ◽  
Nuclear Magnetic

Natural gas hydrate in ocean bottom and permafrost is a great potential energy resource. Compared to fluids hydrocarbons (oil, water and gas) in conventional reservoir evaluation, natural gas hydrate exists in sedimentary formations in solid form, which should be reconsidered in its reservoir evaluation and global reserves assessment. Nuclear magnetic resonance (NMR) technique plays an important role in natural gas hydrate reservoir evaluation. The recent applications of NMR logging in natural gas hydrate reservoir evaluation including formation porosity-permeability estimation, gas hydrate saturation estimation and growth habits prediction in rock pores are introduced. Finally, the potential combination application of downhole NMR 1H relaxation and 13C spectroscopy in natural gas hydrate reservoir evaluation model is also discussed.

Research and Analysis of 30-m Gravity Piston Corer for Natural Gas Hydrate

2020 ◽  
Vol 54 (2) ◽  
pp. 57-68
Author(s):  
Ziqiang Ren ◽  
Jiawang Chen ◽  
Jiamin He ◽  
Hangzhou Wang ◽  
Yuxai Sun ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Alternative Energy ◽  
Storage Conditions ◽  
Outer Diameter ◽  
Natural Gas Hydrate ◽  
Piston Corer ◽  
Finite Element Software ◽  
Sampling Process

AbstractThe use of natural gas hydrate as a strategic alternative energy has increasingly attracted the attention of researchers in related fields. To study the properties of natural gas hydrate, however, obtaining the cores under in-situ pressure is a prerequisite because the cores are under particular combinations of high-pressure and low-temperature storage conditions. This article mainly presents the mechanism of a gravity piston corer in acquiring the pressure core of natural gas hydrate (up to 30 m long). The sampling theoretical model is established, and the corer's motion equation is thereafter derived. Based on the theoretical model, the penetration process of the gravity piston corer into the submarine sediment is analyzed. The weight, inner diameter, outer diameter, and initial speed, which are factors affecting the sampling process, are comprehensively elaborated. Additionally, the sampling process is numerically simulated using ABAQUS finite element software. It is found that the soil and pipe are influenced back by their coupling action, thus affording theoretical and numerical bases for the design and installation of a seabed operation structure. In its verification deployment in the South China Sea, the corer was operated numerous times at different depths; it successfully extracted pressure cores of natural gas hydrate. The theory and sea trails employed in this study are anticipated to support further research on abyssal pressure core corers.

scholarly journals The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7513
Author(s):  
Shilong Shang ◽  
Lijuan Gu ◽  
Hailong Lu
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Gas Production ◽  
Production Performance ◽  
Natural Gas Hydrate ◽  
Conductivity Method ◽  
Fracture Length ◽  
Hydrate Reservoir ◽  
Artificial Fracture

Natural gas hydrate is considered as a potential energy resource. To develop technologies for the exploitation of natural gas hydrate, several field gas production tests have been carried out in permafrost and continental slope sediments. However, the gas production rates in these tests were still limited, and the low permeability of the hydrate-bearing sediments is identified as one of the crucial factors. Artificial fracturing is proposed to promote gas production rate by improving reservoir permeability. In this research, numerical studies about the effect of fracture length and fluid conductivity on production performance were carried out on an artificially fractured Class 3 hydrate reservoir (where the single hydrate zone is surrounded by an overlaying and underlying hydrate-free zone), in which the equivalent conductivity method was applied to depict the artificial fracture. The results show that artificial fracture can enhance gas production by offering an extra fluid flow channel for the migration of gas released from hydrate dissociation. The effect of fracture length on production is closely related to the time frame of production, and gas production improvement by enlarging the fracture length is observed after a certain production duration. Through the production process, secondary hydrate formation is absent in the fracture, and the high conductivity in the fracture is maintained. The results indicate that the increase in fracture conductivity has a limited effect on enhancing gas production.

Technical Analysis of Sand Production for Offshore Natural Gas Hydrate Trials in South China Sea

2021 ◽  
Author(s):  
Kun An ◽  
Lawrence Khin Leong Lau ◽  
Jian Li ◽  
Jia Liu
Keyword(s):  
Particle Size ◽  
Natural Gas ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Clean Energy ◽  
Technical Analysis ◽  
Sand Production ◽  
Natural Gas Hydrate ◽  
China Sea

Abstract Natural gas hydrate emerges as a sustainable and alternative clean energy source. Japan (2013) and China (2017) have performed production trials on marine natural gas hydrate successfully. Sand production with associated risk is one of the main challenges for offshore natural gas hydrate production trials in Japan and China. Technical assessment related to sand production, transport and erosion is a crucial part for overall sand management strategy. This paper demonstrates the importance of flow assurance for marine natural gas hydrate production through the analysis of sand management in South China Sea ShenHu area. Multiphase modelling tool is used to investigate sand transport phenomenon, with parametric study focuses on the effects of production rates, particle bed height and sand particle size. Detailed analysis of particle flow and related erosion along production flow path is investigated by developing a 3-dimensional Computational Fluids Dynamics (CFD) model. Based on the matrix of sensitivity study, steady state operational map for continuous marine natural gas hydrate production is proposed. Such operational map provides useful risks level ranking based on actual field parameters including gas production rate, sand loading and particle size. The operator can maintain production at a lower risk based on the operational map. Through detailed technical analysis of sand production and transport, risks associated with sand blockage and erosion can be actively managed. This provides high values in terms of operational safety, asset integrity, and full compliance with related national or international HSSE standards.

Review of Theory and Practice on Natural Gas Hydrate

2011 ◽  
Vol 361-363 ◽  
pp. 149-160
Author(s):  
Bing Xiang Huang ◽  
Wei Chao Xue ◽  
You Zhuang Wang ◽  
Tong Zhang
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Clean Energy ◽  
High Energy ◽  
Research Field ◽  
Theory And Practice ◽  
High Energy Density ◽  
Natural Gas Hydrate ◽  
Combustion Heat ◽  
The World

Research on Natural Gas Hydrate（NGH）is very popular in recent years. NGH is a potential, new and clean energy with the characteristics of high energy density, high combustion heat, high proven reserves, no pollution, wide distribution and shallow burial and so on. It has been identified that NGH is widely distributed in the plateau, arctic permafrost and some eligible areas in the seabed of epicontinental and continental slope all around the world. According to the research data on NGH at home and abroad, the mineralizing, formation, distribution and exploration technology of NGH are introduced as well as the NGH research status of countries in the world, including China. Many theories and techniques about the exploitation of NGH are not mature yet. Numerous problems still exist in industrial mining NGH, such as environmental, geological problems induced by mining NGH and storage and transportation problems after mining. Finally, the application and mining prospects of NGH are and prospected and summarized to provide a relatively comprehensive reference to this research field.

Research progress of natural gas hydrate exploitation with CO2 replacement: A review

Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 122873
Author(s):  
Wen-Na Wei ◽  
Bo Li ◽  
Quan Gan ◽  
Yuan-Le Li
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Research Progress ◽  
Natural Gas Hydrate
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